Systems Engineer

The Opportunity NTS is seeking a Systems Engineer with experience designing, configuring, integrating, deploying, and sustaining secure operating environments and supporting infrastructure. The Systems Engineer will support system architecture, integration, configuration, testing, troubleshooting, and security hardening, with a primary focus on Linux-based systems, particularly Red Hat Enterprise Linux (RHEL) 8/9 and Rocky Linux 8/9. The position will support U.S. Department of State (DoS) requirements in domestic and overseas (OCONUS) locations where system reliability, security, and operational readiness are essential. The Systems Engineer will work with multidisciplinary technical teams to integrate operating systems, applications, virtualization technologies, and supporting infrastructure to meet mission requirements. Key Responsibilities (Principal Duties and Accountabilities *Essential Functions) Design, configure, integrate, deploy, test, troubleshoot, and sustain Linux-based systems and supporting infrastructure.Configure, maintain, and troubleshoot Red Hat Enterprise Linux (RHEL) 8/9 and Rocky Linux 8/9 environments.Perform system integration activities to ensure operating systems, applications, hardware, and supporting components function together as intended.Implement system configurations, security hardening, patching, and vulnerability remediation in accordance with applicable security requirements.Configure and support Java-based applications, associated runtime environments, and related scripting or configuration requirements.Apply security baselines and implement system security controls in accordance with applicable policies and Security Technical Implementation Guides (STIGs).Perform system installation, integration, verification, validation, testing, and deployment activities.Troubleshoot system-level issues involving operating systems, applications, services, performance, connectivity, and interoperability.Support system configuration management, version control, software updates, and system lifecycle maintenance.Support virtualization technologies, including VMware, and integrate virtualized systems with supporting infrastructure.Support integration and interoperability between Linux and Windows Server environments as required.Configure and troubleshoot system security components, including certificates, authentication services, VPNs, and access controls.Support system monitoring, diagnostics, performance analysis, and operational readiness activities.Develop and maintain system architecture diagrams, configuration documentation, installation procedures, test plans, and as-built documentation.Support security assessment, authorization, and continuous monitoring activities in coordination with cybersecurity and information assurance personnel.Coordinate with network engineers, software engineers, cybersecurity personnel, customers, and vendors to resolve integration issues and meet technical requirements.Support domestic and OCONUS system installations, integrations, troubleshooting, maintenance, and field deployments as required.Perform other duties as assigned in support of program and mission requirements.